Activities
Speciation & Adaptive radiation (2025)
Students investigate adaptive radiation and industrial melanism as well as gradual divergence of populations into separate species. All of these ideas have been contested, especially in social media,...
Activities
Lytic & lysogenic cycles - model answers
These are model answer for activity 2 and Activity 3 on the page Virus structure & function (2025) These are suggested model answers for the activity IB style questions about lytic and lysogenic cycle...
Assessment - introduction
Molecules level topic tests (A1,B1,C1,D1)
The Molecules level covers a range of concept from types of bonding to giant metabolic pathways. This test contains the following: A1.1 Water topic test - IB style questions. There is a set of model...
Assessment - introduction
Cells level topic tests (A2,B2,C2,D2)
The Cells level makes an obvious connection as many topics have something about cells in them, but in addition to this several concepts link topics together. This topic is only for HL students. The test...
Assessment - introduction
Ecosystem level topic tests (A4,B4,C4,D4)
The Ecosystems level is the one which is largest in scale so it's logical that it contains, organisms, cells and molecules. Connections from these topic are numerous to other topics. Here are a few suggestions....
Assessment - introduction
Organism level topic tests (A3,B3,C3,D3)
The Organisms level makes an obvious connection as many topics have something about cells or molecules in them, but in addition to this several concepts link topics together. This test contains the following...
eBook
A3.2 Domains and rRNA - reading task Free
Classification is a method of grouping organisms together. In the time of Carl Linneus evidence was taken from morphological features. This can align with evolutionary pathways if the right features are...
eBook
A3.2 Classification - revision quiz
This test contains a set of revision questions for review or revision of this topic. There are several question styles and answers with explanations....
Activities
ATP a suspected cause of long covid (2025)
This activity covers the structure and importance of ATP as an energy currency in cells. It begins with a reading and analysis task which introduces the importance of ATP in cells, the role of the mitochondrion...
Activities
ATP structure and function - model answers
These are suggested model answers for the activity, ATP structure and function - IB style questions on the page ATP a suspected cause of long covid (2025) As model answers they don't cover all the possible...